Fig. 15From: Enabling visually impaired people to learn three-dimensional tactile graphics with a 3DOF haptic mouseAbility in matching virtual with real objects where the correctness is defined as guessing only shape. Histograms have matching percentages on the x axis and frequencies on the y axis. The legend shows the colour code for each Geometrical Descriptor. On the left, there the VI participants’ data and on the right the BS participants’ onesBack to article page